US4293357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing ceramic honeycomb filters
Assignee: NGK Insulators Ltd
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Filing: 1980-07-14
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Granted: 1981-10-06
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Expires: 2000-07-14
Abstract
Abstract A ceramic honeycomb filter having a large filter area and a low pressure loss is produced by adhering a film on an opening end surface of a porous ceramic honeycomb structural body having a large number of parallel channels extending therethrough, boring holes at a given portion of the film or adhering a film bored at a given portion to an opening end surface of a porous ceramic honeycomb structural body, charging a sealing material into the channels through the bores in the film to seal an end portion of the given channels, and then sealing another end surface of the remaining channels with the sealing material in the same manner as described above.
Inventors
- 👤 Noboru Higuchi
- 👤 Teruo Yano
- 👤 Masahiro Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/003; B28B11/006; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/31; B01D29/50; B01D29/52; B01D46/00; B01D46/24; B01D46/2403; B01D46/2407; C; C04; C04B; C04B38/00; C04B38/0006; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2825; F01N3/2828; B01D2201/00; B01D2201/46; F01N2330/00; F01N2330/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
63 words
A method for producing a ceramic honeycomb filter comprises adhering a film on an opening end surface of a porous ceramic honeycomb sructural body having a large number of channels extending therethrough, boring holes through the film at a given portion, charging a sealing material into the channels through the bores in the film to seal an end portion of the given channels.
Claim 2
Independent Claim
63 words
A method for producing a ceramic honeycomb filter comprises adhering a film on an opening end surface of a porous ceramic honeycomb sructural body having a large number of channels extending therethrough, boring holes through the film at a given portion, charging a sealing material into the channels through the bores in the film to seal an end portion of the given channels.
Claim 3
Dependent Claim
36 words
The method as claimed in claim 1, wherein said film is at least one material selected from the group consisting of a paper, a paper impregnated with a resin and an organic high molecular weight film.
Claim 4
Dependent Claim
13 words
The method as claimed in claim 1, wherein the sealing material has dilatancy.
Claim 5
Dependent Claim
30 words
The method as claimed in claim 1, wherein the sealing material is a batch obtained by mixing ceramic raw material with a binder and a plasticizer, or alumina cement mixture.
Claim 6
Dependent Claim
28 words
The method as claimed in claim 4, wherein said binder is a cellulose derivative, a polyhydric alcohol or a mixture of a cellulose derivative and a polyhydric alcohol.
Claim 7
Dependent Claim
23 words
The method as claimed in claim 1, wherein the sealing material is charged into the channels under pressure, through vibration and/or by dipping.
Claim 8
Dependent Claim
36 words
The method as claimed in claim 1, wherein one end surface of a given channels is sealed with a sealing material and then another end surface of the remaining channels is sealed with the sealing material.
Claim 9
Independent Claim
59 words
A method for producing a ceramic honeycomb filter comprises adhering a film having holes bored at a given portion to an opening end surface of a porous ceramic honeycomb structural body having a large number of channels, charging a sealing material into the channels through the holes in the film to seal an end portion of the given channels.
Claim 10
Independent Claim
59 words
A method for producing a ceramic honeycomb filter comprises adhering a film having holes bored at a given portion to an opening end surface of a porous ceramic honeycomb structural body having a large number of channels, charging a sealing material into the channels through the holes in the film to seal an end portion of the given channels.
Claim 11
Dependent Claim
35 words
The method as claimed in claim 8, wherein said film is at least one selected from the group consisting of a paper, a paper impregnated with a resin and an organic high molecular weight film.
Claim 12
Dependent Claim
13 words
The method as claimed in claim 8, wherein the sealing material has dilatancy.
Claim 13
Dependent Claim
30 words
The method as claimed in claim 8, wherein the sealing material is a batch obtained by mixing ceramic raw material with a binder and a plasticizer, or alumina cement mixture.
Claim 14
Dependent Claim
28 words
The method as claimed in claim 11, wherein said binder is a cellulose derivative, a polyhydric alcohol or a mixture of a cellulose derivative and a polyhydric alcohol.
Claim 15
Dependent Claim
23 words
The method as claimed in claim 8, wherein the sealing material is charged into the channels under pressure, through vibration and/or by dipping.
Claim 16
Dependent Claim
36 words
The method as claimed in claim 8, wherein one end surface of a given channels is sealed with a sealing material and then another end surface of the remaining channels is sealed with the sealing material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |